After 500 years, castle ghost Hui Buh finally has some royal residents to haunt, but he soon loses his license to scare and must get recertified. Michael Herbig, Christoph Maria Herbst, Heike Makatsch, Ellenie Salvo González, Hans Clarin, Rick Kavanian, Nick Brimble Added on Disney 2022-01-11. Added on Netflix 2022-04-01.